EP0919655A2 - Modified shuss knitted netting - Google Patents

Modified shuss knitted netting Download PDF

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Publication number
EP0919655A2
EP0919655A2 EP98308916A EP98308916A EP0919655A2 EP 0919655 A2 EP0919655 A2 EP 0919655A2 EP 98308916 A EP98308916 A EP 98308916A EP 98308916 A EP98308916 A EP 98308916A EP 0919655 A2 EP0919655 A2 EP 0919655A2
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EP
European Patent Office
Prior art keywords
netting
shuss
knitted
knitted netting
length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98308916A
Other languages
German (de)
French (fr)
Other versions
EP0919655A3 (en
EP0919655B1 (en
EP0919655B2 (en
Inventor
Nissim Mass
Yuval Leiber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tama Group
Original Assignee
Tama Plastic Industry
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Priority to EP20030018522 priority Critical patent/EP1369516B1/en
Priority to DE1998617510 priority patent/DE69817510T3/en
Priority to EP20030018521 priority patent/EP1371768B1/en
Priority to DK03018521T priority patent/DK1371768T3/en
Priority to DE1998225132 priority patent/DE29825132U1/en
Application filed by Tama Plastic Industry filed Critical Tama Plastic Industry
Publication of EP0919655A2 publication Critical patent/EP0919655A2/en
Publication of EP0919655A3 publication Critical patent/EP0919655A3/en
Publication of EP0919655B1 publication Critical patent/EP0919655B1/en
Publication of EP0919655B2 publication Critical patent/EP0919655B2/en
Application granted granted Critical
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/10—Open-work fabrics
    • D04B21/12—Open-work fabrics characterised by thread material
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/06—Needle bars; Sinker bars
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F15/00—Baling presses for straw, hay or the like
    • A01F15/07—Rotobalers, i.e. machines for forming cylindrical bales by winding and pressing
    • A01F15/071—Wrapping devices
    • A01F2015/0745—Special features of the wrapping material for wrapping the bale
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/10—Packaging, e.g. bags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/406—Including parallel strips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/425—Including strand which is of specific structural definition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/45—Knit fabric is characterized by a particular or differential knit pattern other than open knit fabric or a fabric in which the strand denier is specified

Definitions

  • This invention relates to knitted netting, and more particularly, to knitted netting as is used in wrapping, e.g. loads on pallets and bales of agricultural products. More particularly, the invention relates to knitted netting used in wrapping wherein the knitted netting is designed to minimise the transverse shrinkage of the netting.
  • FIG. 1 of the accompanying drawings shows a prior art knitted Raschel netting 10 including shuss ribbons 12 and franze ribbons 14 of the type described in US Patent No. 5104714. Because of the triangular pattern in the knitted netting, all Raschel netting becomes narrower when pulled lengthwise. For example, when wrapping a pallet with conventional Raschel netting, when the netting is stretched about 60%, the netting may change in width from 50cm to about 25cm. When a longitudinal force is applied to the knitted netting, the franzes become longer. The longer the franze gets, the longer the shuss must be to maintain the same netting dimensions.
  • the shuss does not extend because the shuss tends to straighten rather than elongate.
  • Transverse shrinkage has been inherent in Raschel knitted netting for as long as machines to produce such knitted netting have existed. It is well known that conventional Raschel netting becomes narrower even while being knitted on Raschel knitting machines. For example, if 48" Raschel knitted netting is desired, about 50" netting is knitted because the netting becomes narrower by about 2" between the knitting and the winding zones.
  • the width can be regulated by changing the shuss tension in the knitting machine.
  • the producers of knitted netting machines provide a facility on their machines to regulate the netting width, which depends on many factors including the type of material, temperature, ribbon dimensions, knitting tension, and knitting pattern.
  • the knitting machine producers are aware that netting shrinkage is inherent in Raschel knitted netting. Such producers are also aware that increased tension on the shuss creates a narrower netting and loosened tension on the shuss prevents narrowing to some degree. Changing the shuss tension, however, is insufficient to fully overcome transverse shrinkage in knitted netting.
  • the Modified Shuss Knitted Netting of the present invention provides a "modified" shuss relative to the shuss of conventional knitted netting.
  • a modified shuss is a shuss whose length is as long as is desired, which is in excess of and distinct from conventional knitted netting with shuss loosened only to the maximum permitted by the knitting machine.
  • the present invention provides a knitted netting which includes longitudinal polyolefin ribbons and lateral polyolefin ribbons knitted with the longitudinal polyolefin ribbons to form knitted netting, at least one of said lateral polyolefin ribbons of the knitted netting have an actual shuss length more than 110% of a calculated shuss length for the knitted netting.
  • the invention further provides a cylindrical bale of agricultural crops wrapped in a knitted netting having longitudinal polyolefin ribbons and lateral polyolefin ribbons knitted with the longitudinal polyolefin ribbons to form knitted netting, the lateral polyolefin ribbons of the knitted netting having an actual shuss length more than 110% of a calculated shuss length for the knitted netting and the knitted netting extending about the circumference and over the edge of the cylindrical body enclosing and maintaining the crops therein.
  • Figure 2 shows a knitted Raschel netting 16 in accordance with the invention which has a "modified" shuss 18 relative to the shuss of conventional knitted netting.
  • the modified shuss has a length longer than the shuss length obtained when loosened to the maximum permitted by the knitting machine.
  • a knitted netting including a modified shuss that is about 30% longer than the prior art shuss provided by the knitting machine becomes narrower by about 12% at 60% elongation of the knitted netting during wrapping, while the same netting without modified shuss becomes narrower by about 50% at 60% elongation.
  • the shuss is created by moving the shuss ribbon between two needles while the netting being knitted moves longitudinally in the knitting machine. Because of the two directional movement, the shuss 18 creates legs of a triangle while the franze 20 creates a triangle base. The tension of the shuss can be adjusted, but is limited and can only produce shuss with an actual length less than 110% of the calculated length of the leg of the triangle created by moving the shuss ribbon between two needles at the longitudinal speed.
  • the preferred amount of elongation of the shuss length depends upon the particular netting application.
  • the preferred actual shuss length is about 135% of the calculated shuss length for the netting.
  • a modified shuss is not needed because such netting only elongates about 1-3% in normal use and does not exhibit transverse shrinkage.
  • Modified Shuss Knitted Netting of the present invention may be seen by comparing an actual shuss length of a given netting length with a calculated shuss length.
  • Modified Shuss Knitted Netting of the invention has an actual shuss length more than 110% of the calculated shuss length.
  • the suggested procedure for comparing actual shuss length with calculated shuss length is illustrated in Figures 3a and 3c and may be described as follows:
  • a corrugated trick plate as shown in Figure 4a may be incorporated into the knitting machine.
  • the use of a conventional trick plate is illustrated, for example, in US patent No. 3646782.
  • the corrugated trick plate includes a flat plate 22 providing corrugations 24 which force the shusses to traverse a longer distance as the shusses move between the knitting machine needles than would be traversed in a conventional knitting machine.
  • the shusses cannot move in a straight line; the shusses must follow the curvature of the corrugated trick plate. Accordingly, when the knitted netting leaves the corrugated trick plate, the shuss length is longer than the original. The thicker the corrugations between needles on the flat plate, the longer the shusses that are produced.
  • a corrugated plate as described with respect to Figure 4a may be used.
  • a flat plate absent corrugations may be used to produce a thicker area between particular needles. This can be achieved by attaching a round piece 26 to the flat plate by means of a screw or other suitable fastener. Round piece 26 is shown in Figure 4b.
  • Insertion or removal of a single round piece is simple. Locating the right parts in the right place when different amounts of shuss modification are needed at different places across the netting is simplified, as a different thickness of the single round piece can be used.
  • the amount of shuss modification created on the complete netting width can be varied to some degree by regulating the shuss tension. This is done by regulating the shuss tension on the existing machine. Only when a different amount of modified shuss across the netting width is needed would different single round pieces (distinguishable by their different thicknesses) be used.
  • the Modified Shuss Knitted Netting provides many unexpected advantages over conventional knitted netting.
  • the Modified Shuss Knitted Netting is somewhat stronger, perhaps because the shusses do not create radial stresses on the franzes as in conventional knitted netting.
  • the slope of the shrinkage/elongation curve created by the Modified Shuss Knitted Netting is a function of the amount by which the shuss is modified. A very small degree of shrinkage always occurs in the Modified Shuss Knitted Netting at the moment when longitudinal force is applied.
  • the last franze will create a 1% elongation.
  • the shusses spread to their maximum length with respect to the length of the modified shuss. Therefore, the distance between the two franzes in this case is larger than the distance between the two needles on the machine.
  • the netting merely does not shrink in width when wrapped around the bale (the distances between franzes remain nearly constant without narrowing), but on both sides of the bale, the distance between franzes becomes more than the distance between needles, due to radial forces that are created which spread the shusses to their maximum modified length.
  • the modified netting of the invention can also be widened to more than its original width, even where longitudinal force is applied on the netting. Such phenomenon is created on the peripheral portions of the bale as discussed above.
  • the present invention is applicable to all kinds of netting containing longitudinal franze and lateral shusses. Even in netting with horizontal shusses which create quadrant openings there will be an advantage if it is knitted with modified shuss. Such netting usually does not shrink on its lengthwise direction; but without modified shuss it could not be widened to more than its original width. Further, the present invention is not limited to any particular material or kind of stands, tapes, monofilament, multifilament, or the like.
  • a knitted netting may be produced with only some loosened shusses on both sides or at any place along the net width, the netting can be widened during wrapping process, at any predetermined area of the wrapped load, etc.
  • Knitted netting may also be produced with different amounts of shuss modification. If a given number of franzes are over the edge, by using higher shuss modification on those franzes would create higher coverage on both bale sides.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Of Fabric (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Woven Fabrics (AREA)
  • Protection Of Plants (AREA)
  • Knitting Machines (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A knitted netting comprising longitudinal polyolefin ribbons and lateral polyolefin ribbons knitted with the longitudinal polyolefin ribbons to form knitted netting. The lateral polyolefin ribbons of the knitted netting have an actual shuss length more than 110% of a calculated shuss length for the knitted netting. The actual shuss length being in excess of 110% of the calculated shuss length for the knitted netting prevents transverse shrinkage of the netting.

Description

This invention relates to knitted netting, and more particularly, to knitted netting as is used in wrapping, e.g. loads on pallets and bales of agricultural products. More particularly, the invention relates to knitted netting used in wrapping wherein the knitted netting is designed to minimise the transverse shrinkage of the netting.
Figure 1 of the accompanying drawings shows a prior art knitted Raschel netting 10 including shuss ribbons 12 and franze ribbons 14 of the type described in US Patent No. 5104714. Because of the triangular pattern in the knitted netting, all Raschel netting becomes narrower when pulled lengthwise. For example, when wrapping a pallet with conventional Raschel netting, when the netting is stretched about 60%, the netting may change in width from 50cm to about 25cm. When a longitudinal force is applied to the knitted netting, the franzes become longer. The longer the franze gets, the longer the shuss must be to maintain the same netting dimensions. However, up to a certain degree of elongation, the shuss does not extend because the shuss tends to straighten rather than elongate. The straighter the shusses, the smaller the distance between franzes, and the narrower the netting becomes resulting in transverse shrinkage of the knitted netting.
Transverse shrinkage has been inherent in Raschel knitted netting for as long as machines to produce such knitted netting have existed. It is well known that conventional Raschel netting becomes narrower even while being knitted on Raschel knitting machines. For example, if 48" Raschel knitted netting is desired, about 50" netting is knitted because the netting becomes narrower by about 2" between the knitting and the winding zones.
When a constant netting width is needed, the width can be regulated by changing the shuss tension in the knitting machine. The producers of knitted netting machines provide a facility on their machines to regulate the netting width, which depends on many factors including the type of material, temperature, ribbon dimensions, knitting tension, and knitting pattern. The knitting machine producers are aware that netting shrinkage is inherent in Raschel knitted netting. Such producers are also aware that increased tension on the shuss creates a narrower netting and loosened tension on the shuss prevents narrowing to some degree. Changing the shuss tension, however, is insufficient to fully overcome transverse shrinkage in knitted netting.
US patent No. 4781291 acknowledges that a problem with Raschel knitted netting is that it shrinks in overall width when pulled lengthwise due to the geometric pattern of the knitted netting and proposes a netting of square openings, instead of Raschel triangles, to solve the problem. By having transverse strands perpendicular to the longitudinal strands, creating rectangular openings instead of triangular, transverse shrinkage is overcome.
Accordingly, there is a need in the art for a knitted netting which does not shrink at all during the production process. Further, there is a need in the art for a knitted netting that maintains its full width during production and may also be widened to more than its full production width.
With the foregoing in mind, the Modified Shuss Knitted Netting of the present invention provides a "modified" shuss relative to the shuss of conventional knitted netting. A modified shuss is a shuss whose length is as long as is desired, which is in excess of and distinct from conventional knitted netting with shuss loosened only to the maximum permitted by the knitting machine.
Accordingly, the present invention provides a knitted netting which includes longitudinal polyolefin ribbons and lateral polyolefin ribbons knitted with the longitudinal polyolefin ribbons to form knitted netting, at least one of said lateral polyolefin ribbons of the knitted netting have an actual shuss length more than 110% of a calculated shuss length for the knitted netting.
The invention further provides a cylindrical bale of agricultural crops wrapped in a knitted netting having longitudinal polyolefin ribbons and lateral polyolefin ribbons knitted with the longitudinal polyolefin ribbons to form knitted netting, the lateral polyolefin ribbons of the knitted netting having an actual shuss length more than 110% of a calculated shuss length for the knitted netting and the knitted netting extending about the circumference and over the edge of the cylindrical body enclosing and maintaining the crops therein.
Preferred embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
  • Figure 1 shows a prior art knitted Raschel netting;
  • Figure 2 shows a knitted Raschel netting in accordance with the invention;
  • Figure 3a illustrates a roll of knitted netting;
  • Figure 3b illustrates a partially unrolled roll of knitted netting;
  • Figure 3c illustrates calculation of shuss length for knitted netting;
  • Figure 4a shows a corrugated trick plate for use in a knitting machine;
  • Figure 4b shows a single round piece for use with a corrugated trick plate;
  • Figure 5 shows a shrinkage/elongation curve for conventional knitted netting;
  • Figure 6 shows a shrinkage/elongation curve for knitted netting according to the invention;
  • Figure 7 shows a hay bale wrapped with conventional knitted netting; and
  • Figure 8 shows a hay bale wrapped with knitted netting according to the invention.
    • Figure 2 shows a knitted Raschel netting 16 in accordance with the invention which has a "modified" shuss 18 relative to the shuss of conventional knitted netting. The modified shuss has a length longer than the shuss length obtained when loosened to the maximum permitted by the knitting machine. For example, a knitted netting including a modified shuss that is about 30% longer than the prior art shuss provided by the knitting machine becomes narrower by about 12% at 60% elongation of the knitted netting during wrapping, while the same netting without modified shuss becomes narrower by about 50% at 60% elongation.
    The shuss is created by moving the shuss ribbon between two needles while the netting being knitted moves longitudinally in the knitting machine. Because of the two directional movement, the shuss 18 creates legs of a triangle while the franze 20 creates a triangle base. The tension of the shuss can be adjusted, but is limited and can only produce shuss with an actual length less than 110% of the calculated length of the leg of the triangle created by moving the shuss ribbon between two needles at the longitudinal speed.
    The preferred amount of elongation of the shuss length depends upon the particular netting application. For elastic pallet wrapping, the preferred actual shuss length is about 135% of the calculated shuss length for the netting. For conventional wrapping netting with an elongation at break of about 20%, a modified shuss is not needed because such netting only elongates about 1-3% in normal use and does not exhibit transverse shrinkage.
    The characteristics of the Modified Shuss Knitted Netting of the present invention may be seen by comparing an actual shuss length of a given netting length with a calculated shuss length. Modified Shuss Knitted Netting of the invention has an actual shuss length more than 110% of the calculated shuss length. The suggested procedure for comparing actual shuss length with calculated shuss length is illustrated in Figures 3a and 3c and may be described as follows:
  • 1) Measure the length (L) between the two extreme franzes on a roll of knitted netting as shown in Figure 3a. (The overall roll length is shown as O).
  • 2) Divide the length (L) by the number of franzes minus one to define an average distance between two franzes (H).
  • 3) Unroll some of the knitted netting and measure the length between 10 such distances (10A) and divide them by 10 to define an average length between two triangle legs (A) as shown in Figure 3b. This measurement should be performed while applying about 50g to the franzes on which the shuss will be measured.
  • 4) Calculate the shuss (S) length between two triangle legs as shown in Figure 3c as follows: S = 2 A/2 + H2
  • 5) Determine an actual shuss length for distance 10A by unrolling some of the knitted netting and transversely cutting the franzes and shusses. Take out the shuss between two franzes and measure the length of the shuss while flattening the shuss on a flat plate to determine the actual shuss length (ASL).
  • 6) For Modified Shuss Knitted Netting of the invention, ASL will exceed 10S by more than 10%.
    • Existing Raschel knitting machines do not provide a facility for providing a modified shuss in accordance with the present invention. The maximum loosened shuss which can be knitted on these machines can at best widen the netting a little bit, but even so the netting will tend to narrow.
    In order to create the modified shuss according to the invention and to overcome such knitting machine limitations, a corrugated trick plate as shown in Figure 4a may be incorporated into the knitting machine. The use of a conventional trick plate is illustrated, for example, in US patent No. 3646782. The corrugated trick plate includes a flat plate 22 providing corrugations 24 which force the shusses to traverse a longer distance as the shusses move between the knitting machine needles than would be traversed in a conventional knitting machine. The shusses cannot move in a straight line; the shusses must follow the curvature of the corrugated trick plate. Accordingly, when the knitted netting leaves the corrugated trick plate, the shuss length is longer than the original. The thicker the corrugations between needles on the flat plate, the longer the shusses that are produced.
    Where an equal amount of shuss modification is needed over the complete netting width, a corrugated plate as described with respect to Figure 4a may be used. Where modified shuss is required only on particular shusses, a flat plate absent corrugations (not shown) may be used to produce a thicker area between particular needles. This can be achieved by attaching a round piece 26 to the flat plate by means of a screw or other suitable fastener. Round piece 26 is shown in Figure 4b.
    With the Modified Shuss Knitted Netting it is not possible to regulate the netting width by increasing the shuss tension as was done in conventional knitted netting. When knitting with modified shuss, the width will always remain the same and will be a function of the number of needles and the distance between them. There will be no shrinking during the knitting process. The width in the Modified Shuss Knitted Netting can differ only in quantum amounts equivalent to the distance between needles.
    It may be appreciated that there are many distinct advantages to the present invention. Insertion or removal of a single round piece is simple. Locating the right parts in the right place when different amounts of shuss modification are needed at different places across the netting is simplified, as a different thickness of the single round piece can be used.
    It is important that when the same amount of shuss modification is needed over the netting width, a single corrugated trick plate (as shown in Figure 4a) may be used.
    The amount of shuss modification created on the complete netting width can be varied to some degree by regulating the shuss tension. This is done by regulating the shuss tension on the existing machine. Only when a different amount of modified shuss across the netting width is needed would different single round pieces (distinguishable by their different thicknesses) be used.
    It will be appreciated by those skilled in the art that the Modified Shuss Knitted Netting according to the invention provides many unexpected advantages over conventional knitted netting. In particular, the Modified Shuss Knitted Netting is somewhat stronger, perhaps because the shusses do not create radial stresses on the franzes as in conventional knitted netting. Comparing Figures 5 and 6, it will be appreciated that the slope of the shrinkage/elongation curve created by the Modified Shuss Knitted Netting is a function of the amount by which the shuss is modified. A very small degree of shrinkage always occurs in the Modified Shuss Knitted Netting at the moment when longitudinal force is applied.
    Comparing Figures 7 and 8, when wrapping a round hay bale by using Modified Shuss Knitted Netting wider than the bale, a considerable amount of over-edge coverage is achieved considering the number of franzes on the outside of the hay bale. (Note that in the Figures D1=D2, L1=L2, and D3>D2). Over-edge-wrapping of hay bales provides the advantage of increasing the covered area on both sides of the bale. Because the franze length would be reduced on the smaller diameter at the extremities, some folding or pleating would be expected to occur as the net spread over the edge. However, the amount of over-edge coverage has been found to be a function of the net elongation while wrapping and the amount of modified shuss. For example, if the circumference length of the last franze is x% shorter and the bale wrapping is performed with an x+ 1% stretch, then the last franze will create a 1% elongation. In this case, even if the shorter franze stretches only 1%, the shusses spread to their maximum length with respect to the length of the modified shuss. Therefore, the distance between the two franzes in this case is larger than the distance between the two needles on the machine. The netting merely does not shrink in width when wrapped around the bale (the distances between franzes remain nearly constant without narrowing), but on both sides of the bale, the distance between franzes becomes more than the distance between needles, due to radial forces that are created which spread the shusses to their maximum modified length.
    In addition to the foregoing properties, the modified netting of the invention can also be widened to more than its original width, even where longitudinal force is applied on the netting. Such phenomenon is created on the peripheral portions of the bale as discussed above.
    The present invention is applicable to all kinds of netting containing longitudinal franze and lateral shusses. Even in netting with horizontal shusses which create quadrant openings there will be an advantage if it is knitted with modified shuss. Such netting usually does not shrink on its lengthwise direction; but without modified shuss it could not be widened to more than its original width. Further, the present invention is not limited to any particular material or kind of stands, tapes, monofilament, multifilament, or the like. Still further, it will be appreciated that a knitted netting may be produced with only some loosened shusses on both sides or at any place along the net width, the netting can be widened during wrapping process, at any predetermined area of the wrapped load, etc.
    Knitted netting may also be produced with different amounts of shuss modification. If a given number of franzes are over the edge, by using higher shuss modification on those franzes would create higher coverage on both bale sides.

    Claims (8)

    1. A knitted netting comprising longitudinal polyolefin ribbons, lateral polyolefin ribbons knitted with said longitudinal polyolefin ribbons to form a knitted netting characterised in that at least one of said lateral polyolefin ribbons of said knitted netting has an actual length more than 110% of the length of a calculated shuss length for said knitted netting.
    2. A knitted netting in accordance with claim 1 characterised in that said at least one of said lateral polyolefin ribbons comprises a plurality of polyolefin ribbons.
    3. A knitted netting in accordance with claim 2 characterised in that said plurality of polyolefin ribbons are on the outside edges of the knitted netting.
    4. A knitted netting in accordance with any preceding claim characterised in that said at least one of said lateral polyolefin ribbons comprises all of said polyolefin ribbons.
    5. A method of producing knitted netting in a knitting machine, comprising supplying lateral polyolefin ribbons, supplying longitudinal polyolefin ribbons, adjusting at least one of the lateral polyolefin ribbon paths in the knitting machine, knitting the lateral polyolefin ribbons knitted with the longitudinal polyolefin ribbons to form a knitted netting characterised in that said step of adjusting at least one of the lateral polyolefin ribbons paths results in a lateral polyolefin ribbon in the knitted netting having an actual length more than 110% of the length of a calculated shuss length for the knitted netting.
    6. A method of producing knitted netting in a knitting machine as claimed in claim 5 characterised in that the step of adjusting at least one of the lateral polyolefin ribbon paths further comprises using a corrugated trick plate in the knitting machine.
    7. A cylindrical bale of agricultural crops, wrapped in a knitted netting in accordance with any of claims 1 to 5 characterised in that said knitted netting extends about the circumference and over the edge of said cylindrical body enclosing to maintain the crops therein.
    8. A wrapped bale of agricultural crops in accordance with claim 7 characterised in that said knitted netting extends over the edge of the cylindrical body securing the edges thereof.
    EP19980308916 1997-11-25 1998-10-30 Modified shuss knitted netting Expired - Lifetime EP0919655B2 (en)

    Priority Applications (5)

    Application Number Priority Date Filing Date Title
    DE1998617510 DE69817510T3 (en) 1997-11-25 1998-10-30 Knitted net with modified weft
    EP20030018521 EP1371768B1 (en) 1997-11-25 1998-10-30 Schuss knitted netting
    DK03018521T DK1371768T3 (en) 1997-11-25 1998-10-30 Don't knit
    DE1998225132 DE29825132U1 (en) 1997-11-25 1998-10-30 Knitted net with modified weft
    EP20030018522 EP1369516B1 (en) 1997-11-25 1998-10-30 Schuss knitted netting

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    US97823597A 1997-11-25 1997-11-25
    US978235 1997-11-25

    Related Child Applications (4)

    Application Number Title Priority Date Filing Date
    EP20030018521 Division EP1371768B1 (en) 1997-11-25 1998-10-30 Schuss knitted netting
    EP20030018522 Division EP1369516B1 (en) 1997-11-25 1998-10-30 Schuss knitted netting
    EP03018521.9 Division-Into 2003-08-16
    EP03018522.7 Division-Into 2003-08-16

    Publications (4)

    Publication Number Publication Date
    EP0919655A2 true EP0919655A2 (en) 1999-06-02
    EP0919655A3 EP0919655A3 (en) 2000-03-15
    EP0919655B1 EP0919655B1 (en) 2003-08-27
    EP0919655B2 EP0919655B2 (en) 2011-08-10

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    ID=25525886

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    Application Number Title Priority Date Filing Date
    EP19980308916 Expired - Lifetime EP0919655B2 (en) 1997-11-25 1998-10-30 Modified shuss knitted netting
    EP20030018521 Expired - Lifetime EP1371768B1 (en) 1997-11-25 1998-10-30 Schuss knitted netting
    EP20030018522 Expired - Lifetime EP1369516B1 (en) 1997-11-25 1998-10-30 Schuss knitted netting

    Family Applications After (2)

    Application Number Title Priority Date Filing Date
    EP20030018521 Expired - Lifetime EP1371768B1 (en) 1997-11-25 1998-10-30 Schuss knitted netting
    EP20030018522 Expired - Lifetime EP1369516B1 (en) 1997-11-25 1998-10-30 Schuss knitted netting

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    US (2) US6521551B1 (en)
    EP (3) EP0919655B2 (en)
    JP (1) JP3861230B2 (en)
    AR (1) AR013992A1 (en)
    AT (3) ATE248243T1 (en)
    AU (1) AU743282B2 (en)
    BR (1) BR9804478B1 (en)
    CA (1) CA2251235C (en)
    CR (1) CR5914A (en)
    CY (1) CY1110876T1 (en)
    DE (4) DE69841832D1 (en)
    DK (2) DK0919655T4 (en)
    ES (3) ES2202761T5 (en)
    NO (1) NO323044B1 (en)
    NZ (1) NZ332595A (en)
    PT (3) PT919655E (en)
    UY (1) UY25241A1 (en)
    ZA (1) ZA9810074B (en)

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    WO2013057597A1 (en) 2011-10-17 2013-04-25 Cordenet-Produtora De Redes Agricolas, S.A. Knitted net for wrapping agricultural products
    EP1751336B1 (en) * 2004-05-11 2016-10-19 Piippo Oy Method and apparatus for treating a binding net, and a binding net
    PT110606A (en) * 2018-03-05 2019-09-05 Cotesi Companhia De Texteis Sinteticos S A AGRICULTURAL KNIT FOR BALING.

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    EP1751336B1 (en) * 2004-05-11 2016-10-19 Piippo Oy Method and apparatus for treating a binding net, and a binding net
    EP1743968A1 (en) * 2005-07-11 2007-01-17 Giro GH S.A. Warp knitted mesh fabric for the packaging of pallets
    ES2278505A1 (en) * 2005-07-11 2007-08-01 Giro Gh, S.A. Warp knitted mesh fabric for the packaging of pallets
    ES2278505B1 (en) * 2005-07-11 2008-06-16 Giro Gh, S.A. MESH FABRIC FOR PACKING PALLETS.
    FR2893035A1 (en) * 2005-11-08 2007-05-11 Paul Riedel Thin wind-break, for reducing wind speed by converting kinetic energy into internal friction, consists of screen with knitted extruded monofilament yarns in warp direction and flat strips in weft direction
    GR1007649B (en) * 2011-03-10 2012-07-13 Καρατζη Βιομηχανικες Ξενοδοχειακες Επιχειρησεις Α.Ε., Method for producing an overextended elastic or non-elastic web (net) for packaging industrial and agricultural products.
    US9909239B2 (en) 2011-03-10 2018-03-06 Karatzis S.A. Method for producing a net with elongated stitches
    WO2013057597A1 (en) 2011-10-17 2013-04-25 Cordenet-Produtora De Redes Agricolas, S.A. Knitted net for wrapping agricultural products
    PT110606A (en) * 2018-03-05 2019-09-05 Cotesi Companhia De Texteis Sinteticos S A AGRICULTURAL KNIT FOR BALING.
    WO2019172791A1 (en) * 2018-03-05 2019-09-12 Cotesi - Companhia De Têxteis Sintéticos, S.A. Agricultural mesh for baling
    PT110606B (en) * 2018-03-05 2021-02-05 Cotesi - Companhia De Têxteis Sintéticos, S.A. AGRICULTURAL MESH FOR BALING.

    Also Published As

    Publication number Publication date
    JP3861230B2 (en) 2006-12-20
    CR5914A (en) 1999-07-28
    CA2251235C (en) 2006-09-05
    EP0919655A3 (en) 2000-03-15
    ATE442470T1 (en) 2009-09-15
    UY25241A1 (en) 1999-05-14
    ATE477360T1 (en) 2010-08-15
    AU743282B2 (en) 2002-01-24
    US6521551B1 (en) 2003-02-18
    DE29825132U1 (en) 2005-03-24
    DE69841832D1 (en) 2010-09-23
    EP1371768B1 (en) 2010-08-11
    NO984998L (en) 1999-05-26
    ES2350632T3 (en) 2011-01-25
    US20010004572A1 (en) 2001-06-21
    EP1369516B1 (en) 2009-09-09
    ES2202761T3 (en) 2004-04-01
    DK0919655T3 (en) 2003-11-24
    DK0919655T4 (en) 2011-09-12
    EP1369516A1 (en) 2003-12-10
    NZ332595A (en) 2000-07-28
    BR9804478B1 (en) 2010-07-27
    DK1371768T3 (en) 2010-09-20
    EP0919655B1 (en) 2003-08-27
    AR013992A1 (en) 2001-01-31
    BR9804478A (en) 2001-09-18
    PT1369516E (en) 2009-09-28
    DE69817510T3 (en) 2011-12-01
    PT919655E (en) 2003-12-31
    CA2251235A1 (en) 1999-05-25
    CY1110876T1 (en) 2015-06-10
    DE69817510D1 (en) 2003-10-02
    ES2202761T5 (en) 2011-11-02
    ATE248243T1 (en) 2003-09-15
    DE69817510T2 (en) 2004-06-17
    AU8962398A (en) 1999-06-17
    EP0919655B2 (en) 2011-08-10
    NO984998D0 (en) 1998-10-27
    NO323044B1 (en) 2006-12-27
    EP1371768A1 (en) 2003-12-17
    ES2333209T3 (en) 2010-02-18
    ZA9810074B (en) 1999-05-31
    JPH11315453A (en) 1999-11-16
    DE69841145D1 (en) 2009-10-22
    US6840067B2 (en) 2005-01-11
    PT1371768E (en) 2010-08-25

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